New York -LRB- CNN -RRB- -- The mayor of Newark has called for an investigation into a far-reaching New York Police Department surveillance program that was allegedly conducted in the New Jersey city 's Muslim 's neighborhoods .

`` The Newark Police Department was not involved in joint operations with the New York Police Department as was described in the disclosed NYPD report , '' Mayor Cory Booker said Wednesday , referring to a leaked internal New York police document that allegedly detailed police surveillance of Muslim-owned business and mosques across the city .

`` I strongly believe that we must be vigilant in protecting our citizens from crime and terrorism but to put large segments of a religious community under surveillance with no legitimate cause or provocation clearly crosses a line , '' he said .

New Jersey Gov. Chris Christie also called the development `` disturbing '' and has asked the state 's attorney general to investigate .

The 60-page report , first obtained by The Associated Press , showed maps of Newark and photographs of Muslim residences and mosques .

There was no statement in the document regarding terrorism or criminal activity .

The New Jersey mayor 's statement comes a day after New York Mayor Michael Bloomberg defended the extent of police surveillance against critics who have suggested authorities went too far .

`` We have to keep this country safe , '' the mayor told reporters , addressing questions about a separate report , also leaked to AP , that indicated the New York police were closely monitoring Muslim student associations in schools across the Northeast .

`` If people put things on websites and make them available to everybody , of course the NYPD is going to look at anything that 's publicly available in the public domain , '' Bloomberg said . `` And given we 've had a dozen people arrested or convicted of terrorist acts who 've come from similar organizations , we have an obligation to do so . ''

That report said police have tracked websites , and on one occasion sent an undercover officer with students from the City College of New York on a whitewater rafting trip .

`` The police department goes where there are allegations , '' Bloomberg said .

But Yale University President Richard Levin described New York 's surveillance program as `` antithetical to the values '' of the New Haven , Connecticut , university and those of the nation .

When a reporter asked if police had gone too far by sending the agent on the rafting trip , Bloomberg responded , `` No . ''

Police spokesman Paul Browne told CNN that his agency does not monitor students directly but confirmed it monitors websites they use .

`` In any case where you see an NYPD officer present , it 's an indication that we were looking at an individual , '' he said .

The Columbia University Muslim Students Association condemned the police practice in a statement this week .

`` We are concerned that news reports about NYPD 's presence on our campus have a chilling effect on the intellectual freedom necessary for a vibrant academic community , '' it read .

In December , a prominent group of Muslim leaders boycotted Bloomberg 's annual interfaith breakfast in protest of the controversial program .

The move stemmed from a series of earlier news reports that raised questions about the nature of a CIA partnership with the New York police that allegedly helped to build city intelligence programs to spy on Muslims .

The boycott stood in a stark contrast to the goodwill the mayor earned among Muslim leaders when he defended plans for a controversial Islamic community center near the former site of the World Trade Center in Lower Manhattan .

The CIA later announced its internal watchdog found no issue or evidence of wrongdoing in the spy agency 's partnership with New York police .

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Newark 's mayor calls for investigation into New York Police Department surveillance

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New Jersey Gov. Chris Christie also calls the development `` disturbing ''

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Christie asks state 's attorney general to investigate reports of spying on Newark Muslim areas